Trump and Macron met for the first time at the U.S. ambassador’s residence in Brussels on Thursday.

Trump first congratulated Macron on his “tremendous” victory that was being talked about “all over the world.”

As Trump spoke, Macron sat silently, hands slightly fidgeting, waiting for what was to come: the handshake.

But Macron wasn’t messing around.

The shake went on for a while, with Macron clearly leading it. They stared at each other for a few moments as Macron grasped Trump’s hand even tighter.

The White House pool report of the handshake described it this way: “[E]ach president gripped the other’s hand with considerable intensity, their knuckles turning white and their jaws clenching and faces tightening.”